title: Prevalence of CD8/CD4 ratio in the fetal thymic parenchyme in Down's syndrome.
mesh_terms: D016516:CD4-CD8 Ratio; D004314:Down Syndrome / Q000196:embryology / Q000276:immunology* / Q000473:pathology; D005333:Fetus / Q000276:immunology* / Q000473:pathology; D005865:Gestational Age; D006801:Humans; D013950:Thymus Gland / Q000196:embryology / Q000276:immunology* / Q000473:pathology